Dip-sticks



Aug. 28, 1956 A. c. JOHNSON DIP-STICKS Filed Nov. 2, 1955 IN V EN TOR.19.54779 6. dam/50M United States Patent DIP-STICKS Ashton C. Johnson,Brookfield, Wis.

Application November 2, 1955, Serial No. 544,401

4 Claims. (Cl. 210-1.5)

This invention relates to improvements in attachments for crankcasedip-sticks, and more particularly to a novel attachment embodyingmodified forms of the invention shown in my application bearing theSerial Number 517,280, filed June 22, 1955.

An object of the invention is to provide a device of the type includingan element of magnesium and a permanent magnet securely fixed to acrankcase dip-stick.

Another object of the invention is to provide means for permanentlyattaching said element to a dip-stick.

Other and further objects of the invention will appear as thedescription proceeds, reference being had to the accompanying drawing,in which:

Fig. 1 is a fragmentary sectional view of a crankcase provided with adip-stick embodying the invention.

Fig. 2 is a side view in elevation of the attachment.

Fig. 3 is a view of the dip-stick from the edge thereof, provided withsaid attachment.

Fig. 4 is a view taken on line 44 of Fig. 2.

Fig. 5 is a view in elevation of a modified form of the invention shownattached to the lower end of a dip-stick.

Fig. 6 is a vertical sectional view thereof.

Referring more particularly to the drawings, the numeral 10 refers tothe device generally, comprised of a dip-stick 11 with the conventionalhandle 12. At the lower end 13 of the dip-stick 11, a cylinder ofmagnesium is secured by means of the snap-rings 15 and 16. The magnesiumcylinder 14 has a slot at 17 for the greater portion of its length toreceive the end 13 of the dip-stick and is externally grooved at 18 and19 to receive the snap-rings 15 and 16. After assembly the rings arestruck with a hammer to indent the side edges of the dip-stick 11,whereupon said snap-rings will lock securely into the indentations toretain the cylinder 14. The lower end 20 of the cylinder 14 has alongitudinal bore 21, into which a permanent magnet 22 is forced with adriving fit.

In use, the magnesium cylinder will eliminate acid action in the oil 23of the conventional vehicle crankcase 24, and the magnet 22 will drawand retain metallic particles which would be undesirable in the oilcontent.

In Figs. 5 and 6 a modified form of the invention is shown in which adip-stick 30 has the lower end portion 31 bent at right angles at 32 androunded ofi at 33. A hollow cylinder 34 of magnesium and a second hollowcylinder 35 are held above and below, respectively, the lower endportion 31 of the dip-stick 30, by means of the bolt 36 and nut 37. Thehollow cylinder 35 comprises a permanent magnet.

It will be understood that the device is capable of many modificationsin structure and design, without departing from the spirit of theinvention, within the scope of the appended claims.

Having thus described the invention, what is claimed and desired to besecured by Letters Patent of the United States, is:

1. In combination with a dip-stick, a longitudinally slotted magnesiumelement having circumferential grooves fitted over the end of saiddip-stick, and a plurality of snap-rings engaged in said grooves tosecure said element on the dip-stick.

2. In combination with a dip-stick, a longitudinally slotted cylindricalmagnesium element having external circumferential grooves fitted overthe end of said dipstick, and a plurality of snap-rings engaged in saidgrooves, said dip-stick having a plurality of edge indentations toreceive the snap-rings and fix the magnesium element on the dip-stick.

3. In combination with a dip-stick, a longitudinally slotted cylindricalmagnesium element having external circumferential grooves fitted overthe end of said dip-stick, and a plurality of snap-rings engaged in saidgrooves, said magnesium element having an axial bore in its free end,and a permanent magnet rod held in said bore with a driving fit.

4. A dip-stick, a right angle bent apertured lower end thereon, a hollowcylindrical magnesium element, and bolt means securing said element tothe lower end of the dip-stick.

References Cited in the file of this patent UNITED STATES PATENTS1,752,050 Young Mar. 25, 1930 FOREIGN PATENTS 303,076 Great Britain Dec.27, 1928 OTHER REFERENCES Motor Trend magazine, November 1953, page 7(published by Trend, Inc., Los Angeles, Calif.).

3. IN COMBINATION WITH A DIP-STICK, A LONGITUDINALLY SLOTTED CYLINDRICAL MAGNESIUM ELEMENT HAVING EXTERNAL CIRCUMFERENTIAL GROOVES FITTED OVER THE END OF SAID DIP-STICK, AND A PLURALITY OF SNAP-RINGS ENGAGED IN SAID GROOVES, SAID MAGNESIUM ELEMENT HAVING AN AXIAL BORE IN ITS FREE END, AND A PERMANENT MAGNET ROD HELD IN SAID BORE WITH A DRIVING FIT.
 4. A DIP-STICK, A RIGHT ANGLE BENT APERTURED LOWER END THEREON, A HOLLOW CYLINDRICAL MAGNESIUM ELEMENT, AND BOLT MEANS SECURING SAID ELEMENT TO THE LOWER END OF THE DIP-STICK. 